The Atmospheric Chemistry Suite (ACS) package is an element of the Russian contribution to the ESA-Roscosmos ExoMars 2016 Trace Gas Orbiter (TGO) mission. ACS consists of three separate infrared ...spectrometers, sharing common mechanical, electrical, and thermal interfaces. This ensemble of spectrometers has been designed and developed in response to the Trace Gas Orbiter mission objectives that specifically address the requirement of high sensitivity instruments to enable the unambiguous detection of trace gases of potential geophysical or biological interest. For this reason, ACS embarks a set of instruments achieving simultaneously very high accuracy (ppt level), very high resolving power (>10,000) and large spectral coverage (0.7 to 17 μm—the visible to thermal infrared range). The near-infrared (NIR) channel is a versatile spectrometer covering the 0.7–1.6 μm spectral range with a resolving power of ∼20,000. NIR employs the combination of an echelle grating with an AOTF (Acousto-Optical Tunable Filter) as diffraction order selector. This channel will be mainly operated in solar occultation and nadir, and can also perform limb observations. The scientific goals of NIR are the measurements of water vapor, aerosols, and dayside or night side airglows. The mid-infrared (MIR) channel is a cross-dispersion echelle instrument dedicated to solar occultation measurements in the 2.2–4.4 μm range. MIR achieves a resolving power of >50,000. It has been designed to accomplish the most sensitive measurements ever of the trace gases present in the Martian atmosphere. The thermal-infrared channel (TIRVIM) is a 2-inch double pendulum Fourier-transform spectrometer encompassing the spectral range of 1.7–17 μm with apodized resolution varying from 0.2 to 1.3 cm
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. TIRVIM is primarily dedicated to profiling temperature from the surface up to ∼60 km and to monitor aerosol abundance in nadir. TIRVIM also has a limb and solar occultation capability. The technical concept of the instrument, its accommodation on the spacecraft, the optical designs as well as some of the calibrations, and the expected performances for its three channels are described.
A description is given of the control structure of scientific instruments and data transfer management system involved in the CORONAS-PHOTON satellite mission. The technical capabilities of all ...specialized instruments to provide the function of the scientific instruments and spacecract (SC) support systems are unified in a single structure. The correctness of the proposed and implemented structure has been verified by the operation of the CORONAS-PHOTON’s complex of scientific instruments. Control of the scientific instruments was maintained using one-time and program pulse commands (OTC and PPC), as well as command data files (CDF), which are transmitted via onboard control units. Up to 30 OTC and 52 kbit of CDF can be transmitted per one control session. The date is transmitted to data-acquisition ground stations (DAGS) at Scientific center for Earth orbital monitoring. Up to 1.3 Gbyte of data can be transmitted per day. Data encryption and reception by two DAGS simultaneously was used to reduce the quantity of transmission failures. The CORONAS-PHOTON SC has been performing scientific experiments from February to December 2009. Over this period, 297 control sessions and 1050 data acquisition sessions were performed; about 5 Mbit of uplink control data were transmitted on board SC, and 250 Gbyte of scientific data were received by DAGS.
The Interhelioprobe mission aims to investigate the inner heliosphere and the Sun from close distances (up to 0.3 AU) and from out of the ecliptic plane (up to 30°). In this paper we present the ...relevance of the mission and its main scientific objectives, describe the scientific payload, ballistic scenario and orbits of the spacecraft. Possibilities of scientific cooperation with other solar and heliospheric space missions are also mentioned.
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